Semiautomatic mutual inductance bridge for magnetic susceptibility measurements

1979 ◽  
Vol 50 (7) ◽  
pp. 921-922 ◽  
Author(s):  
Masafumi Kumano ◽  
Yusaku Ikegami
Keyword(s):  
Magnetic Susceptibility ◽  
Mutual Inductance ◽  
Mutual Inductance Bridge

MAGNETIC SUSCEPTIBILITY MEASUREMENTS IN MINNESOTA PART I: TECHNIQUE OF MEASUREMENT

Geophysics ◽  
1952 ◽  
Vol 17 (3) ◽  
pp. 531-543 ◽  
Author(s):  
Harold M. Mooney
Keyword(s):  
Magnetic Susceptibility ◽  
Ferric Chloride ◽  
Mutual Inductance ◽  
Small Sample ◽  
Small Samples ◽  
Rock Surface ◽  
Rock Types ◽  
Surface Irregularities ◽  
Instrument Measurement ◽  
Mutual Inductance Bridge

Susceptibility determinations have been made on 200 outcrops of 11 rock types, using a three‐coil induction instrument. Measurement is effective over a hemisphere of 50 cm radius. Data are given to show that the instrument is much less sensitive to rock surface irregularities than any previously described. Measuring circuits consist of 975 cycle oscillator, mutual inductance bridge, and two‐stage amplifier. Investigation of errors shows that surface irregularities remain most important. Calibration by calculation is checked against ferric chloride standards through small samples taken at each outcrop. Data are given to show: 1) rock variability makes the check inconclusive, 2) variation of susceptibility within outcrops for gabbro and basalt is of the same order as variation between outcrops, 3) small‐sample measurements show greater variation than large‐sample measurements.

Mutual Inductance Bridge and Cryostat for Low‐Temperature Magnetic Measurements

1954 ◽  
Vol 25 (12) ◽  
pp. 1178-1182 ◽  
Author(s):  
R. A. Erickson ◽  
L. D. Roberts ◽  
J. W. T. Dabbs
Keyword(s):  
Low Temperature ◽  
Magnetic Measurements ◽  
Mutual Inductance ◽  
Mutual Inductance Bridge
Sign in / Sign up

Export Citation Format

Share Document